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GRE Math Challenge #14-Driving at 48 miles per hour [#permalink]
 07 Sep 2014, 06:26
Question Stats:
83% (00:25) correct
16% (01:04) wrong based on 24 sessions
Driving at 48 miles per hour, how many minutes will take to drive 32 miles? A. 2/3 B. 3/2 C. 40 D. 45 E. 2400
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Re: GRE Math Challenge #14-Driving at 48 miles per hour [#permalink]
05 Apr 2016, 15:01
answer c????
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Re: GRE Math Challenge #14-Driving at 48 miles per hour [#permalink]
05 Apr 2016, 15:16
rampragash wrote: answer c???? Yes, that is correct.
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Re: GRE Math Challenge #14-Driving at 48 miles per hour [#permalink]
05 Apr 2016, 22:09
Yups, 40 mins to drive 32 miles.
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Re: GRE Math Challenge #14-Driving at 48 miles per hour [#permalink]
09 May 2016, 15:59
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sandy wrote: Driving at 48 miles per hour, how many minutes will take to drive 32 miles?
A. 2/3
B. 3/2
C. 40
D. 45
E. 2400 Solution: We know that rate x time = distance, so time = distance/rate. We must determine how many minutes it will take to drive 32 miles while driving at a rate of 48 miles per hour. Time = 32/48 hours Time = 2/3 hours Now we can convert 2/3 hours to minutes. 2/3 x 60 = 40 minutes. Answer: C
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Re: GRE Math Challenge #14-Driving at 48 miles per hour [#permalink]
08 Aug 2019, 11:35
With problems like these I most often use dimensional analysis (that's what my chemistry teacher called it). Attached is the general process.
Attachments
daum_equation_1565293026659.png [ 131.14 KiB | Viewed 120 times ]
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Re: GRE Math Challenge #14-Driving at 48 miles per hour
[#permalink]
08 Aug 2019, 11:35
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